In the additional information of the PlexUtilities there is section called IOP where you can test the decay of the laser diode.
What results do you get?
For a brand new drive (never used for writing a disc) I get 6.8% CD and 9.1% for DVD.
In the help there is a picture of 1.3%.
Are my values too high and I should return the drive?
Some older drives (about 2 years old) show
CD: 1.0% DVD: 1.7%
CD: 6.0% DVD: 0.5% Bly-Ray: 1.0%
What do you think?